Oppo A3S Flash File

On this page Download  Oppo A3S Flash File Stock Firmware, CPH1803 Firmware ROM version is Android Oreo 8.1. Fix hang on the logo, dead Boot, and many other bugs issues with this tested Firmware.

At Rom flashing process your all user data will remove IF you are trying to update your Device make a backup of all your personal data before it.

Download Oppo A3S Stock ROM Flash File

File Information
Device Name Oppo
Model Number A3S
Brand Oppo
Version Oppo_A3S_CPH1803
OS Version Oreo 8.1
CPU Type Qualcomm
File Type Firmware
Country USA& All
Password No
Credit Free
Date 29.11.2018


  1. Download and install Qualcomm Android Device Driver
  2. Oppo A3S Flash File Download
  3. Download QFIL Flash Tool latest setup
  4. Use Miracle Box Software for flash this firmware
  5. Device Battery must be charged at least 40-50 percent to perform this process

How to Flash Oppo A3S Firmware

  • Download and Extract Oppo A3S Flash File using WinRar or 7Zip.
  • Install Android USB Device Driver, IF already installed then skip it
  • Power OF Device and remove the battery if removable
  • Open QFIL Flash Tool
  • Choose Load tab from Tool and select downloaded XML file
  • Connect Device with PC via USB data cable
  • Click on Download or Upgrade tab from QFIL Flash Tool for start the process
  • Take a rest and don,t unplug device under the flashing process
  • The firmware write process is done in a few minutes
  • An OK Message will appear on Flash Tool screen
  • Congratulation Stock Firmware installed successfully.
  • Power ON Device and you have done it.


The Stock Firmware help to recover OS Upgrade, Dead issue, Screen Lock, user security lock and any software related issue.

The above tutorial only works with the Stock ROM or Custom ROM which comes basically with XML file in Qualcomm Devices, and before writing Stock ROM read Firmware carefully

Note: Please make a backup of your Device before install or Firmware

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